package com.summer.internet;

import org.junit.Test;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class UDPTest {
    @Test
    public void sender() throws IOException {
        DatagramSocket socket = new DatagramSocket();
        String str = "我是udp发送的数据包";
        byte[] data = str.getBytes();
        InetAddress host = InetAddress.getLocalHost();
        DatagramPacket packet = new DatagramPacket(data,0,data.length,host,9090);
        socket.send(packet);
        socket.close();
    }
    @Test
    public void receiver() throws IOException {
        DatagramSocket socket = new DatagramSocket(9090);
        byte[] buffer=new byte[100];
        DatagramPacket packet = new DatagramPacket(buffer,0,buffer.length);
        socket.receive(packet);
        System.out.println(new String(packet.getData(),0,packet.getLength()));
    }
}
